Home / 28,670.12-39,564-15,922.92

Finding the Fourth Proportional to 28,670.12, 39,564 and 15,922.92

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Solution

The fourth proportional to 28,670.12, 39,564 and 15,922.92 is: 21,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,670.12 : 39,564 = 15,922.92 : x
  2. Step 2: Convert to fraction form
    28,670.12/39,564 = 15,922.92/x
  3. Step 3: Cross multiply
    28,670.12x = 39,564 × 15,922.92
  4. Step 4: Simplify right side
    28,670.12x = 629,974,406.88
  5. Step 5: Solve for x
    x = 629,974,406.88/28,670.12
  6. Step 6: Final answer
    x = 21,973.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.